Fatal error: Uncaught Error: Class 'Prophecy\Doubler\Doubler' not found in /opt/lampp/htdocs/kuesioner/vendor/phpspec/prophecy/src/Prophecy/Doubler/CachedDoubler.php:22 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/kuesioner/vendor/phpspec/prophecy/src/Prophecy/Doubler/CachedDoubler.php on line 22